Other Expenses (Schedule Of Other Expenses Presented In The Accompanying Consolidated Comprehensive Statements of Earnings) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015
Other Income And Expenses [Abstract]
Foreign exchange (gain) loss, net	$ (132)	$ 39		$ 25
Asset retirement obligation accretion	62	75	[1]	75	[1]
Restructuring and transaction costs		267		78
Other, net	(54)	(6)		86
Total	$ (124)	$ 375	[1]	$ 264	[1]

[1] Prior year amounts have been recast due to change in accounting principle. See Note 2 in “Item 8. Financial Statements and Supplementary Data” of this report.